package cn.tedu.v3_2;

import java.io.*;
import java.net.ConnectException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

/**
 * Client 客户端--改成Server模式  【优化】
 */
public class Client {
    private Socket socket;
    private String ip;
    private  static final String HOST="127.0.0.1";
    private static final Integer PORT=6666;
    private BufferedReader br;
    private PrintWriter pw;
    public Client() {
        try {
            socket=new Socket(HOST,PORT);
            br=new BufferedReader(new InputStreamReader
                    (socket.getInputStream(),"UTF8"));
            pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter
                    (socket.getOutputStream(),
                            "UTF8")), true);
        } catch (NullPointerException e) {
            System.out.println("友情提示: IP传入错误导致链接失败~");
        } catch (UnknownHostException e) {
            System.out.println("友情提示: IP传入错误");
        } catch (ConnectException e) {
            System.out.println("客户端链接失败: 建议检查IP或者端口号");
        } catch (IOException e) {
            System.out.println("客户端链接服务器端失败，提示: 检查IP/端口");
        }
    }
    public void start() {
        ip=socket.getInetAddress().getHostAddress();
        try {

            new Thread(()->{
                try {
                    String message;
                    while ((message= br.readLine())!=null){
                        System.out.println("服务器端说: "+message);
                        System.out.println("客户端请输入: ");
                    }
                } catch (IOException e) {
                    System.out.println("你的服务器端读入失败!");
                }
            }).start();

            Scanner input = new Scanner(System.in);
            while (true) {
                System.out.println(ip+"客户端请输入: ");
                String say=input.nextLine();
                pw.println("客户端说: "+say);
            }
        }catch (NullPointerException e){
            System.out.println("IO流传输对象，有对象为null,请立马核对。"
                    +"建议: 查看try块中对象可能赋值为null");
        } finally {
            if (br!=null) {
                try {
                    br.close();
                } catch (IOException e) {
                    System.out.println("客户端关闭异常~");
                }
            }
            if (pw!=null)
                  pw.close();
            if (socket!=null&&!socket.isClosed()){
                try {
                    socket.close();
                } catch (IOException e) {
                    System.out.println("客户端关闭出现异常");
                }
            }
        }
    }
    public static void main(String[] args) {
        Client client=new Client();
        client.start();
    }
}
